- ... that Colorado State Highway 82 (pictured, as Aspen's Main Street) intersects only one other state highway along its 85-mile (137 km) length?
- ...that all three states where U.S. Route 99 once ran maintain a state route 99 that is a portion of the former route?
- ... that before its reconstruction in the late 1990s, Cincinnati's Fort Washington Way was the most accident-prone mile of urban freeway in Ohio?
- ...that the final piece of the coast-to-coast Interstate 10 to be completed was the Papago Freeway Tunnel in 1990?
- ... that Maryland Route 24 parallels Deer Creek through Rocks State Park?